This is my code:class ApplicationController < ActionController::Base # Prevent CSRF attacks by raising an exception. # For APIs, you may want to use :null_session instead. protect_from_forgery with: :exception helper_method :current_user

def current_user@current_user ||= User.find(session[:user_id]) if session[:user_id] endendI am doing exactly what it says in the instruction, I even copied and pasted the code but it wont let me go through